* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: white;
    font-family: Arial, Helvetica, sans-serif;
}

.ventana {
    width: 760px;
    min-height: 100vh;
    margin: 0 auto;
    background: white;
}

.pagina {
    padding-top: 130px;
}

h1 {
    text-align: center;
    color: #a02a23;
    font-size: 32px;
    font-weight: bold;
    margin: 0 0 35px 0;
    text-shadow:
        1px 1px 0 #f1b4ae,
        2px 2px 0 #6b6b6b;
}

.salas {
    display: flex;
    justify-content: center;
    gap: 55px;
    margin-bottom: 18px;
}

.salas a {
    width: 170px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(#77a8eb, #2e5f9d);
    color: white;
    font-size: 25px;
    text-decoration: none;
    box-shadow: 4px 5px 7px rgba(0,0,0,0.45);
    border: 1px solid #31598d;
}

.salas a.activa {
    border-bottom: 8px solid #76c9df;
}

.zona-cine {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 35px;
}

/* 🔥 SIN BORDE */
.columna-asientos {
    width: 105px;
    padding: 8px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.asiento {
    width: 74px;
    height: 74px;
    margin-bottom: 8px;
}

.asiento img {
    width: 74px;
    height: 74px;
    display: block;
}

/* 🔥 SIN BORDE */
.zona-formulario {
    width: 415px;
    min-height: 350px;
    padding: 28px 10px;
}

.fila-formulario {
    height: 86px;
}

.fila-formulario form {
    display: flex;
    align-items: center;
    gap: 32px;
}

.fila-formulario button {
    width: 120px;
    height: 45px;
    border-radius: 8px;
    border: 2px solid black;
    background: linear-gradient(#eeeeee, #bcbcbc);
    font-size: 16px;
    color: black;
    cursor: pointer;
    box-shadow: 2px 3px 4px rgba(0,0,0,0.45);
}

.fila-formulario input[type="text"] {
    width: 230px;
    height: 30px;
    border: 2px solid #999;
    font-size: 16px;
    padding-left: 12px;
}